Patients who meet eligibility criteria will be administered vorinostat orally at 300mg two times daily for 7 days as outlined in table 1.1. AZA will be administered SC at 75 mg/m2/day x 7 consecutive days or at maximum tolerated dose if a dose reduction of AZA was needed before entering the trial with a minimum dose of 50mg/m2/d for 7 consecutive days.